Ligand Conversion in Nanocrystal Synthesis: The Oxidation of Alkylamines to Fatty Acids by Nitrate

Calcabrini, Mariano and Van den Eynden, Dietger and Ribot, Sergi Sánchez and Pokratath, Rohan and Llorca, Jordi and De Roo, Jonathan and Ibáñez, Maria. (2021) Ligand Conversion in Nanocrystal Synthesis: The Oxidation of Alkylamines to Fatty Acids by Nitrate. JACS Au, 1. pp. 1898-1903.

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Official URL: https://edoc.unibas.ch/85527/

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Ligands are a fundamental part of nanocrystals. They control and direct nanocrystal syntheses and provide colloidal stability. Bound ligands also affect the nanocrystals’ chemical reactivity and electronic structure. Surface chemistry is thus crucial to understand nanocrystal properties and functionality. Here, we investigate the synthesis of metal oxide nanocrystals (CeO2-x, ZnO, and NiO) from metal nitrate precursors, in the presence of oleylamine ligands. Surprisingly, the nanocrystals are capped exclusively with a fatty acid instead of oleylamine. Analysis of the reaction mixtures with nuclear magnetic resonance spectroscopy revealed several reaction byproducts and intermediates that are common to the decomposition of Ce, Zn, Ni, and Zr nitrate precursors. Our evidence supports the oxidation of alkylamine and formation of a carboxylic acid, thus unraveling this counterintuitive surface chemistry.
Faculties and Departments:05 Faculty of Science > Departement Chemie > Chemie > Nanomaterials (De Roo)
UniBasel Contributors:De Roo, Jonathan and Pokratath, Rohan and Van den Eynden, Dietger
Item Type:Article, refereed
Article Subtype:Research Article
Publisher:American Chemical Society
Note:Publication type according to Uni Basel Research Database: Journal article
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Last Modified:11 Jun 2022 03:10
Deposited On:11 Dec 2021 08:45

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